HP HP12C hp 12c_user's guide_English_E_HDPMBF12E44.pdf - Page 27

Section 2: Percentage and Calendar Functions 27 Net Amount A net amount - that is, the base amount plus or minus the percentage amount - can be calculated easily with your hp 12c, since the calculator holds the base amount inside after you calculate a percentage amount. To calculate a net amount, simply calculate the percentage amount, then press = or -. Example: You're buying a new car that lists for $13,250. The dealer offers you a discount of 8%, and the sales tax is 6%. Find the amount the dealer is charging you, then find the total cost to you, including tax. Keystrokes Display 13250\ 8b 6b = 13,250.00 Keys in the base amount and separates it from the percentage. 1,060.00 Amount of discount. 12,190.00 Base amount less discount. 731.40 Amount of tax (on $12,190). 12,921.40 Total cost: base amount less discount plus tax. Percent Difference To find the percent difference between two numbers: 1. Key in the base number. 2. Press \ to separate the other number from the base number. 3. Key in the other number. 4. Press à. If the other number is greater than the base number, the percent difference will be positive. If the other number is less than the base number, the percent difference will be negative. Therefore, a positive answer indicates an increase, while a negative answer indicates a decrease. If you are calculating a percent difference over time, the base number is typically the amount occurring first. Example: Yesterday your stock fell from 581/2 to 531/4 per share. What is the percent change? Keystrokes Display 58.5\ 53.25 58.50 53.25 Keys in the base number and separates it from the other number. Keys in the other number. à -8.97 Nearly a 9% decrease. File name: hp 12c_user's guide_English_HDPMBF12E44 Printered Date: 2005/7/29 Page: 27 of 209 Dimension: 14.8 cm x 21 cm